DMF-Based Large-Grain Spanning Cu₂ ZnSn(S_x ,Se_{1- x} )₄ Device with a PCE of 11.76.

ABSTRACT: A main concern of the promising DMF-based Cu₂ ZnSn(S_x ,Se_{1- x} )₄ (CZTSSe) solar cells lies in the absence of a large-grain spanning structure, which is a key factor for high open-circuit voltage (V_oc ) and power conversion efficiency (PCE). A new strategy to achieve CZTSSe large-grain spanning monolayer is proposed, by taking advantage of the synergistic optimization with a Cu²⁺ plus Sn²⁺ redox system and pre-annealing temperatures. A series of structural, morphological, electrical, and photoelectric characterizations are employed to study the effects of the pre-annealing temperatures on absorber qualities, and an optimized temperature of 430 ℃ is determined. The growth mechanism of the large-grain span

SUBMITTER: Cui Y 

PROVIDER: S-EPMC9284129 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature